c隻是代表光速在同媒介/無媒介下不變，沒說隻有在真空中啊。上麵改一下，如果光必需要在媒介中傳播。

來源: 露重煙微於 2024-10-30 10:40:00 [舊帖] [給我悄悄話] 本文已被閱讀：次

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